In World War I the Marine Corps distinguished itself on the battlefields of France as the 4th Marine Brigade earned the title of "Devil Dogs" for heroic action during 1918 at Belleau Wood, Soissons, St. Michiel, Blanc Mont, and in the final Meuse-Argonne offensive. Marine aviation, which dates from 1912, also played a part in the war effort, as Marine pilots flew day bomber missions over France and Belgium. More than 30,000 Marines had served in France and more than a third were killed or wounded in six months of intense fighting